Saw filing device



Aug. 21,` 1945. A Ni. QRSKQG, 2,383,151

SAW FILING DEVICE Filed April 6, 1942 INVENTOR.

ICHAEL ORSKOG. BY u Z Z) ATTORNEY.

Patented Aug. 21, 194.5`

2,383,151 p sAw FILiNerfnEvfor:` Michael Orvskog, ElmW-tluitlPark," k

Q Appiicatimi Aprile,1942,-seriallnafias I iclaims. (oi. '16g-36) This invention relates to fileholders and more particularly to saw lingdevices, although certain features thereof may be employed with` equal advantages for other purposes.y n

It contemplates moreespccially the provision of an improved le holder' for sharpening saws and similar tools in a much more effective manner `Without entailing as much time or skill.

Saw blades of numerous cuts and types are utilized for many diierent operations. Itis particularly necessary to'sharpen wood saws on the I job in that their `constant vuse by a carpenter or other technician, rendersit necessary to give the cutting edge constant attention.

Then, too, each technician such as a carpenter employs a different saw-cut `adapted to his particular requirement and stroke. This requires adjustability in the file holding `device so that various angles `maybeirnpartedto. the cutting edge of the saw with `precision `and uniformity throughout thelength thereof. t Angular adjustment of the le holders andthe utilization of a guide so that successive teeth will be uniform in any predetermined angularity enables the sharpening on the :job with precision by those who are not especially skilled in use of sharpening operations. A file holder and guide has been provided as adjustable within a wide range to meet the dictates of any particular technician or the varied requirements in effectively utilizing hand or power saws. n 1- One object of the present invention is `to simplify the construction and improve the operation of devices of the character mentioned. Another object is to provide a plurality of file holders that are capable of being spaced in angular adjustment so that one may be utilized as a guide for the other in sharpening saws and the like. 1

Still another object is to provide a plurality of file holders having .calibrated adjusting expedients in conjunction with` angular edges toset a le in any predetermined angle for saw blade sharpening purposes. I

A still further object is to provide a manual filev holder handle `with ,angularly adjustable the following.description` of an inustratedemg bodiment of the present invention. J

In the drawing: AFigurel is aside view in elevation of` a device embodying features of the present invention. U Figure Zis afront view in elevation Aof the device .shown in Figure 1, part of :the handle being broken away to enable an enlarged showing of the operative elements.

Figure 3fis aifragmentary rear view inaelevation of a. le holder mount and 'its horizontal adjusting element.

Figure 4 is a sectional `view taken substantially along line :lV-IV of Figure 3. A l.

u The illustrated embodiment comprises a manual grasping handle I0 which may be shaped or constructed from wood or` other suitable material depending upon the choice of the i user. The handle I0 is downwardly inclined `relative toa horizontal offset shank II which flares outwardly as at I2-I3 to merge with upstanding ears IIi-I 5 that are spaced from each other beyond the width of the narrow handle IIJ.

'Ihe` ears I4-'-I5 confront each other and `pro-` ject above the surface of the shank II to` freely receive an elongated screw I6 that :is journaled for rotation in the ears I4-I5. The screw I6 has oppositely pitchedthreads II-I 8 `provided thereon to extendfrom the opposite extremities thereof to the center I9 to effect the displacement of` le holders as will appear more fully hereinafter. In order to effect the rotation of the oppositely threaded rod or elongated screw I6,l a circular disc 20 having a knurled periphery 2| is attached to one extremity of the elongated screw I6, in this instance' `beyond the ear I4, to enable the manual rotation thereof and effect the opposite displacement of file holder mounts that are operatively connectedV thereto. i

To this `end,lfile holder mounts 22--23, in this instancetwo, comprise tubular cylindrical members (Figure 4) that are sized to receive the tapered shank 24 of suitable ,files 25 which, in this instance, are of triangular cross-section.

Plurality set screws 26, 2l and 28, in this instance threeythreadedly engage correspondingly shaped apertures provided radially through the tubular l mounts 22-23 to engagethe le shank 24along the length of themounts 22-23 'and at various angles relative to each other. In this instance, the lradially defined set'screws 26--21--28 are equidistantly disposed along the `mounts 22-23 at degree `angles to effectively grasp the le shank 24 against any possible accidental movement or displacement. It should be noted that .holder mounts 22-23.. threaded annular shoulder; 311-015 cachot the le suitable graduations 49 that are calibrated to determine the angle at which the Iile holder 22-23 will be disposed when `displaceahle guide pins 50 or 5I. are aligned with any particular graduation 49 along the slots 48 of the upstanding plates 36-31.

To this end, the guide studs 50 project from square collars 5I which have oppositely projecting trip studs 52 corresponding to and in horizontal `alignment with the guide studs 50 (Figure ,4).` It" should be noted that the oppostely projecting studs 52 project within the plane of @the angle .control plates 33e-34 which have subange 32 so that the mounts 22-23 will *rotatel with the angle control plates 33-34. The mounts 22-23 carry collars 35 on the smooth cylindrical shoulder 3I in aposition adjacent'the angle control plates 33-34. Upstandinggu'ide plates 36--31 have apertures 38 correspondingjn size with the smooth annular shoulder 3I of "thele A nutf39 `,engages the holder mounts 22-#23 to engage against..the.11p standing guide. plates 316--.3.1fin orderto maintain theparts in assembled predetermined.l relation.y The nuts\.39 are .-preferalolyof` circular oemigurastan-tially V-shaped notches 53 communicating The oppositely extending;- studs 52 project within the substantially Vshaped lnotches 53 so that their converging l edgeswill engage one side or the other of the tionkand `have aperipheralgknurl 4il.thereon.vto

enable .the .convenient and effectivefinger rota.- tion thereof. 'f l", f i

When thenuts upstanding y,guide platesSS, peripheral flanges 3.2 of the mounts 22-23 are ydrawn .togethenfto hold the. angle control blades :33 and their respective le holder' mounts J2 Zee-23. in` .predetermined angular position. Inl .orderto iadju'stahlyhsuppor-t thev mounts 22.-.23-and..provide for the angular adjustmentthereof tozanyipredetermined degree, theguide plates 36-31. Iterminate downwardly 5in horizontally l-o'ffset. brackets'. comprising spaced ears 4l-42 andl 43-44 .-formed .integrally with ups-tanding .guide plates.. 36e-531,2.. respectively.` The spaced ears v42h-4210i .theupstandinggui'de :plates 36 are horizontally aperturedfand threaded as Aat 45to meshlwith .the-threads- I-1 lonthe elongatedr screw I6 journa'led` between .the .confront--. inghandle earsI4-I 5.. .Similarly the spacedlears 43-44 of opstanding-guide plate 3:1.1 are; corre, s'pondingly-` perforated and threaded; as.. at1,45 to mesh with the threadedportiony I8A of; the elongated* screw 16 so Ithat manual: rotation of theknurleddisc .25 will .causetheupstanding guide plates4 36e-3.1 to.. approachy orlrecede ffrom each-other so thatftheyfare atta corresponding distance from the center I9'. of the elongated. screw I6, thereby correspondinglyrspacingA the file holder mounts 22-23 which movel therewithV as.'I a'. part oftheupstanding guide plates 36-`--31.. f.. `L- ``To preclude the rotary displacement of .the upstanding guide platesy 35--31A relative f to.v the elongated screw.: I 6,-: .the` ears'. 4 I..-42.; and: 435-44 thereofl are apertured as at .461 in .horizontal spaced relation .to the threaded aperture .45.-v (ligure-),l to. receive a guide;.rod 41 therethrough;l The guide rod 41 .bridgesthe ears .Ide- 1.5;y tolserve as aguide rod forithe opstanding guide platefhrack-i.

ets.4I-42. and I3- 4.4; thereby, preventing-the tilting of the fileholders: 2:2-.23..inv.a clockwise or counter-clockwise direction.relativetothe.hanf dley IUS-when viewed from Figures l andul-gsothat the-rile holder mounts: 22.-.-23 may be.-.-ad.j.usted' tol any* desired. predetermined Aposition .ofi .'rota'.-` tion.v Sothat the lesz25 willzbeatiapcorrespon'ding angle,4 the .upstanding` guide':plates.-36'31 are provided with elongated vertical lslots 1.481. therethrough Therslots .482 are .provided with studs52 serving as tripping means for the angle guide control plates 33-34. This will throw the file holder mounts 222--23utoa corresponding. angle: depending .uponlthe .vertical position of the oppositely projecting studs. V5.0-52...servingV .las guide tripping means inhc'onjunction; with the polygonal collars 5I rThe .vertical `position of .the polygonal. collars 5lk is determined` azvertical elongated screw .54 which iscarriedbetweenza horizontally offset '..topf.1lange 55 of the. vertical guide plates. 36--31 and .the collars. 35.? onfthe shoulders 3I of'` the file holden mounts 224-213; To.. this end, the .s lower. extremities of. 'the clon-.- gated verticalrscrews. 54zare providedwith .reduced ends. 55. lodged in.. correspondingly. sized; recesses 51 provided in eachlof. theicollars ..351 of ltheifile holder'mounts 22-23-.1 i

- y.'Ihezulcxper extremities- 58' of. the venticalielone gated-screw54 com-prise reduced'extensions'which proj'ectthrough the horizontally offset guide .plate iianges 55 to receive a knul-led adjusting disc59 attachedthereto -for effecting'the .rotation there@ of.` Consequently,- the. knurled adjusting.. screws Editor. each of the verticalv guide..plates`r 35e-31 raise .or lowerv collarsl havingfan internal/bore threaded msh with .the elongated'verticalscrews 54.-A It should be noted that the.. studs. 501 imay be provided4 witha. horizontal indicator line.y or. notch to alignzwitheany ofthesdesiredgraduations-49` along the slots 48 `in the verticalguide plates 36-31. The graduationsp49.: are 'preferably calibrated. indegrees. soothat therOtatin-Of the knurled adjusting disc 59 in one direction or .the other will raiseor lower the oppositely. protical collar 5lI'.r: 1

When the indicator notch "Bionthe studs 55 are aligned with the. calibration 49.' of the desired angle forholding-the.iiles"25; the -le holder `rrmuntnuts 391-are loosened lto perm-iut*l the Imounts 22'-2 3Ft0- gether with their angle control plates 33-34to he rotated `sothat one or theother of the converging, edges 53M contact. against thestuds 52. and de-V termine the angle position ofy the. file.. holder mounts. 22-'23.. Thereuponithenutslilzare again tightened to maintain theafile.v holder. mounts 22-23 withtheir filesl215.. atv thexdesired'; angle. rIhe spacing ofxthe file. holder; mounts22-.-23, inl'turn, is vdetermined 'bytheelongated horizontal screw I E .which mayberotatedin `one direction or the other by! the;knurled Quijusting-Ldisc,v 2te; This spaces the les 25 with their mountsyff to correspond withrthexspacingyof the teeth onthe saw cutting edge- .4 ,Consegnently,` the `rsaw ycutting edgecan be sharpenedbyutilizingOne of theflles 25 as a guide while the other le serves tosharpen the.. tooth aligned therewith jtoy a corresponding l me.

, angle. `Thei'lles 25 are thus engaged with succes-` sive teeth on the saw cutting edge until they are all uniformlysharpened to the desired angle with Aone le serving `as a guidefortheother or others dependingupon the number of mounts d 22-23, in this instance two, that maybe desired t for any sawsharpening operation.` A

The reverse angle saw teeth on the cutting edge, may be correspondingly iiled by reversingthe an-` gularity` ofthe les 25 and their holders 22-23.

are provided with converging edges defining the 'substantially V-shaped notches 53 so that one or `For that reason, `theangle control plates 33-34 f the other may engage `the studs52 in order to t ,l 'adjust the file holders 22-23 not only tothe del sired angle, butalso to enable ling of oppositely `inclined teeth that are alternately disposed along a saw cutting edge. Y

With the arrangement of" parts above described i it Willbe apparent that a very simpleand effective file holder for manual sharpening "purposes has been provided wherein the initial `angular adjustment can be` set and thereafterthe le holder mounts are rotatably displaced to the limit of` movement for preadjustment. This insures accuracy, without entailing constant observation by the attendant. Most carpenters and other technicians utilizing equipment of this character are not in a` position to observe their adjustment with any degree of accuracy because of poorlighting conditionsand, of course, poor" eyesight maybe `a 1` `factor among carpenters and others in analogous trades. The instrument can be set in oneFposition where light is available and thereafter ad- `justments completed without any particular obi servation because of the limiting characterof the, i

` angle control plates. Speed, uniformity, and ac curacy inthe `sharpening operation is obtained `j without `,any appreciable skill or experience.`

spond with special teethconguration. d d

While I have illustrated and describeda preferred embodiment of this invention, it `must be understood that `the invention is capable of considerable variation and modification without departing from the spirit of the invention. I, therefore, do not wish to be limited `tothe precise de,-

t tails of `construction set forth, but desire to avail `myselfof such variations and modifications as come within the scope of the appended claims.

I claim; l l. Ina `sharpening of a screw journalled on said handle member, threads of opposite pitch on said screw rod le holder mounts threadedly connected` to said screw rod, iile holders .rotatively connected `to said mounts, means for fastening said holders in any device ofthe charactertde-` scribed, thecombination with a handle member,

scribed, the combination with a handle member, of le `holder mounts rotativelyconnectedtosaid handle member, iile holders rotatively connected to said mounts, means for-fastening said holders in any position of rotary adjustment relative to said ,mounts angular guides xed to said` file i holder mounts, guide tripping means mounted for frdisplacementalong `apredetermined path within the limits'of said angular guidesr to determinethe r angle set for said le holders means for `displacingsaid guide tripping means to change therlimit l of angularity` forsaid file holder mounts, and

means 1 for retaining said Ele holders inany adjusted angular position.

3. In asharpening device of the character` described, the combination `with a handle having confronting membersV extending therefrom, of a single screw rotatively` mounted` betweensaid confrontingrhandlemembers, rile holder mounts y' threadedly engaging said screw means on said handle, and means for rotating said, screw to simultaneously vary the relative spacing `of said file holder mounts `symmetrically of said handle to correspond with spaced `teeth of a cutting edge.

4. In a sharpening device of the character det scribed, the combination with a handle member,

of a le holder mount pivotally connected to said handle member, a plurality of `iiles in said holder mount, an angular limit stop adjustably mountedon said handle member to cooperate with said le holder mount to control the pivotal position' thereof relative to said handle member, and

. means `for adjusting said angular limit stop to f determine and control the pivotal, displacement Vof said le holdermount to correspond with the teeth cutting angles;

5., In asharpening device of the `character described, the combination witha "handle, of a threaded rod rotatively mounted on saidhandle, file holder mounts threadedly `engaging said `threaded rod, aplurality of le holders pivotally d For circular.`metal saws, there would be a requirementofor other shapesA of iles to correassociated with `said mounts,` means on said threadedrod for effecting the rotation thereof to` vary` the` relative .spacing of said` rile holder mounts so that the files therein will engage` corre-,- spondingly spaced teethf of a cutting edge, and

means for varying the angularlposition of said` le holders to correspond with the cutting angle of saw teeth and the like.

6. In a sharpening device of the `character described, the combination with a handle member,

of a rod having a series of threads of opposite I pitch on portions thereof, said rod being rotatively mounted on said handle member,` a plurality of file holder mounts threadedly engaging each series of threads on said rod, and means to rotate said rod forsimultaneously effecting the displacement of said rlle holder mounts relative to each other.

scribed, the combination with a handle member,

`of a rod `having a series of` threads of opposite `.pitch journalled in said handle member, a plu- `position ofrotary adjustment relative to said mounts, angular guides fixed to said `iile holder mounts, and guide tripping means mounted for displacement along apredetermined path within the limits of said angular guides to determine the limiting angleset for saidle holder mounts.

`2. In a sharpening device of the character demounts.

rality `of parallel` mounts threadedly engaging` each series ofthreads of said rod, le holders pivotally associated with said mounts,"ancl means to rotate said`rod in opposite 'directions for` effecting the simultaneous parallel displacement of said le `holders and mounts relative to each d other, and means yfor retaining said holders in any adjusted pivotal positionon their respective d mCHAELoRsKoG.

7. In a `sharpeningdevice of the `character det 

